killed during a home invasion. laura ingle is covering this trial live from new haven, connecticut. i just want our viewers to know, this is a graphic case, and there are some disturbing details about sexual assault and the murders themselves. so just as a warning before we listen to laura. but this has been such a tough week for the family. they've already been through so much, but now they had to sit in the courtroom and listen to the worst. what happened there today? >> reporter: hi megyn. indeed they not only had to listen to a lot of the testimony here that involved the very grim and graphic details of what happened to their loved ones, but yesterday, autopsy photos were shown and they did have to leave the courtroom. but let's get to today. we're talking about basically a dna lesson inside the courtroom for jurors, a state forensics expert testified today about the evidence that was collected in the sexual assault used on jennifer hawk petit, the mother in this case and her two daughters. the evidence that was talked about today backed up the prosecution's case that the mother o